Grinding attachment for lathes.



No. 7|0.808. Patented Oct. 7, I902.

R. M. RUSSELL.

GRINDING ATTACHMENT FOB LATHES.

[Application filed Oct. 28, 1901 (N0 Model.) 3 Sheets-Sheet l.

6 4 7 $6 5 ,1,- an] MHZ ,7,- w n f7 W & h

||""7\i a "HEM-:1.

. L L/Am! 23 I 3/ J4 I WHWESSES, INVE TOR I BY Wm) WM JTTORNEYS.

w: Nomus Perms co, PHOTDLITHDH vusumsmmp. c.

No. 7l0,808.

P'atentd Oct. 7, I902. n. n. RUSSELL.

GRINDING ATTACHMENT FOB LATHES.

(Applicltion M Oct. 98, 1901.)

3 Sheets-Sheet 3.

(No Ilouel.)

A TTORNEYS.

WITNESSES:

UNITED STATES PATENT OFFICE.

ROSS M. RUSSELL, OF BINGIIAMTON, NEW YORK.

GRINDING ATTACHMENT FOR LATHES.

SPECIFICATION forming part of Letters Patent No. 710,808, dated October '7, 1902.

Application filed October 28, 1901. Serial No. 80,271. (No model.)

To mil mhmrt it ntrty concern.-

Be it known that 1, Ross M. RUssnLL, of Binghamton. in the county of Brooms, in the State of New York,have invented new and use ful Improvements in Grinding Attachments for Lathes, of which the following, taken in connection with the accompanying drawings, is a full, clear, and exact description.

This invention relates to improvements in grinding attachments for lathes, having more particular reference to means for grinding milling-tools, reamers, and similar toothed or ribbed cutters.

My object is to producea simple, practical, and efficient device which may be readily secured to an ordinary tool-post of a lathe and in which rotary motion is transmitted to the grinding-wheel by suitable driving mechanism actuated by one of the revoluble members of the lathe.

A further object is to so construct and arrange the various parts of the attachment as to render the same adaptable for grinding various sizes and classes of cutters.

Another object is to provide the attachment with a rotatable head for supporting the article to be ground, wherebysaid article may be adjusted to any desired angle relative to the axis of the grinding member, said head being adapted to be moved across the face of the grinding member.

A still further object is to provide an adjustable support for the grinding member with a suitable rest, whereby the grinding member and rest may be simultaneously adjusted toward and away from the work, or, rather, from the supporting-head for the article to be ground.

To this end the invention consists in the combination, construction, and arrangement of the parts of a grinding attachment for lathes, as hereinafter fully described, and pointed out in the claims.

Referring to the drawings, Figure 1 is a perspective View ofa portion ofa lathe and my improved attachmen tin operative position. Fig. 2 is a side or end elevation of my device detached from the lathe, showing the rotatable head and supporting-sleeve for the article to be ground in section. Figs. 3 and 4 are sectional views taken, respectively, on lines 3 3 and 4 at of Fig. 2. Fig. 5 is a detail View similar to As seen in the drawings, myinvention con-.

sists of a sectional frame having mounted thereon a driving-shaft 1, a rotary grindingwheel 2, and a supporting-head 3 for the article to be ground. The supporting-frame of my improved lathe attachment preferably consists of a tool-post section 4, a drivingshaft-supporting section 5, a grinding-wheelsupporting section 6, and an additional section 7 for supporting the rotatable head which carries the article to be ground. The tool-supporting section 4 may be of any desired form, size, or construction, being preferably provided with an angular arm 8, adapted to enter an opening 9 in an ordinary tool-post 10, Fig. 1, and is secured in position by the usual clamping-screw 11 of the toolpost. One end of the tool-post section 4: is provided with a threaded stud 12, which is arranged to receive a slotted arm 13 of the section 5, said section 5 being held in position by a suitable clamping-nut 14, engaged with the threaded stud 12 and arm 13 for holding the section 5in position. The other end of the tool-post section 4 is provided With a lengthwise slot or guideway 15, which receives a suitable clamping-screw 16, having a nut 17,-by'means of which the section '7 is firmly clamped to the tool-post section 1.

As previously stated, the section 5, and particularly the arm 13, is provided with a length wise slot to receive the stud 12, which permits said section 5 to be adjusted lengthwise of the tool-post section 4 and at the same time permits the section 5 to be rocked upon the stud 12 to facilitate the adjustment of the drivingshaft 1 relative to the axis of the grindingwheel, said section 5 being held in its adjust ed position by the clamping-nut 14. This section 5 is provided with a bearing 18 for receivin g the driving-shaft 1, which is held from endwise movement by suitable collars engaged with the opposite end of the bearing 18. One end of the driving-shaft 1 is provided with a friction-wheel 20, adapted to engage one of the revoluble members, as the periphery of the face-plate 21 of the lathe, the other end of said driving-shaft being provided with a pulley 22, which is connected by a belt 23 to a pulley 24, secured to the grinding-wheel 2 for transmitting rotary motion thereto. The pulley 24 is provided upon the revoluble shaft 25, which is journaled in a suitable bearing 26, arranged substantially parallel with the bearing 18 and projects laterally from the upper end of the framesection 6, the shaft 25 being held from endwise movement by a collar 27 and the pulley 24, which engage the opposite end faces of the bearing 26. The end of the spindle 25 adjacent to the pulley is provided with clamping-plates 28, one of which is removable, being held in position by a clamping-screw 29 for permitting the insertion or removal of the grinding-wheel 2, it being apparent that the shaft 25 may be readily removed by loosening the collar 27 at the opposite end of the shaft, said collar being held in position by a set-screw or equivalent device 30. This frame 6 is pivoted at its lower end at 31 to the toolpost section 4 and preferably extends upwardly above the upper face of the tool-post section and is provided with an elongated slot or opening 32 for receiving a clamping-screw 33, one end of which is engaged with the inner face of the section 6, and its other end is passed through an opening 34 in the tool-post section and engaged by a nut 35, which firmly clamps the section 6 in its adjusted position, it being apparent that the elongated slot 32 permits the section 6 to be rocked upon its pivot 31 for moving the grinding-wheel toward and away from the driving-shaft 1, or rather toward and away from the support for the article to be ground, presently described. In order to facilitate this adjustment of the grinding-wheel and its supporting-section, I provide the tool-supporting section with an adjusting-screw 36,which is movable in a threaded socket or aperture 37 and is adapted to engage the adjacent edge of the section b above its pivot. Secured to the section 6 by suitable fastening means, as screws 38, is a bracket 39, having a rearwardly-extending arm 40, upon which is mounted a sliding restsupport 41, this rest-support being formed with a lengthwise slot 42, adapted to receive clamping-screws 43, which serve to hold the member 41 in its adjusted position and permit its adjustment at substantially right angles to the axis of the grinding member 2. Adjustably mounted upon a lateral extension 44 of the support 41 is a rest 45, this extension being arranged substantially parallel with the grinding member 2, and is provided with a lengthwise slot 46, adapted to receive a clamping-screw 47 for holding the rest 45 in its adjusted position. The slot 46 and clam ping-screw 47 permit the rest to be adjusted lengthwise of the axis of the grinding member, or rather along the grinding-face of said member, in order to adapt the rest to various classes of work or tools to be ground. This rest 45 is adapted to receive and support the cutting edge of the article being ground, and therefore lies in close proximity to the periphery of the grinding member 2, with its upper edge slightly beneath the horizontal axial plane of the grinding member in order to give the proper undercut to the edge of the tool during the process of grinding the same.

The section 7 preferably consists of an upright bar adjustable lengthwise of the toolsection 4 and provided with laterally-projecting guides or bearings 48 and 49, which are arranged substantially parallel with each other and with the axis of the grinding member 2 in planes beneath and above said axis.

In order to maintain the section 7 in a substantiaily upright position, it is provided with transverse shoulders or bearing-faces 50, movable in the slot 15, and, together with the clamping-screw l6 and nut 17, serve to firmly hold the section 6 in its adjusted position. The object of this lengthwise adjustment of the section 6 and guides 48 and 49, carried thereby, is to permit the various sizes and classes of articles to be ground to be properly adjusted relatively to the grinding-surface of the member 2. Mounted upon the bearing 48 is a sliding support 51, which is adapted to be moved along the said bearing across the face of the grinding member 2, said support being provided with a lengthwise opening for receiving the bearing 48, and with a hollow upright boss or projection 52, having an annular flange 52 at its upper end, provided with graduations upon its periphery.

The revolving head 3 consists, essentially, of a hollow cylindrical portion 53, having a depending spindle or stud 54, journaled in the boss or bearing 52 and normally resting upon the upper face of the flange portion 52. Projecting upwardly from the cylindrical portion 53 is a hollow boss 55 for receiving a yoke 56, the upper end of which is provided with an aperture to receive the upper guide-bar 49, this yoke 56 serving to connect the upper end of the revoluble head 53 with the upper bearing 49 and forms an additional support for said head during its movement along the bearings 48 and 49. The bosses 52 and 55 are provided with threaded apertures for receiving clamping-screws 57 and 58, which serve to lock the head 53 from revoluble movement and to hold the same at any desired angle relative to the axis of the grinding memberas, for instance, when grinding cutters with beveled cutting edges. In order to permit the article being ground to be rotated for successively presenting the cutting edges or teeth of the cutter to the rest and against the periphery of the grinding member, I provide the, head 53 with a revoluble sleeve 59, having one end formed with a flange 60, engaged with one end of the face or bearing 53, and its other end is provided with an annular groove 61, which is adapted to receive the innerend of a retaining-screw 62, the flange and screw 62 serving to prevent the endwise movement of the sleeve and at the same time to permit its rotary movement. Extending through the sleeve 59 is a clamping-bolt 63, having one end provided with a head 64, its opposite end being threaded and provided with a nut adapted to engage the opposite end face of the sleeve for driving the clamping-bolt endwise and clamping the article to be ground between the head 64 and flange 60 of the sleeve 59. It is well known to those skilled in the art that these milling-tools are provided with different sizes of bore, and in order to properly center these cutters upon the spindle or clamping-bolt 63 I usuallyprovide removable bushings or collars 65 of different standard diameters to closely fit the bore of the tool to be ground.

In the operation of my invention the clamping-bolt 63 is removed from the head 53 and the proper bushing to fit the bore of the tool to be ground is then slipped over the end of the clamping-bolt and against the head 64, whereupon the clamping-bolt and its bushing are inserted into the bore of the tool to be ground, and said clamping-bolt is then passed through the sleeve 59 and the tool being then clamped in position against the flange 60 by means of the nut at the upper end of the clamping-bolt. The work is then adjusted to the desired angle relatively to the grinding member and the slidingsupport movedlengthwise of the guides or bearings 48 and 49,with the cutting edge of the tool bearing upon the rest 45 and against the periphery of the grinding member. WVhen one tooth or cutting edge is sufficiently ground, the sleeve carrying the article to be ground is rotated one tooth and the operation repeated, it being understood that when the head is adjusted to the desired angle it is firmly clamped in position by the thumb-screws 57 and 58, the exact angle of the head being indicated by suitable means, as a mark 66.

If for any reason it is desired to change the position of either the grinding member or the tool-supporting head relatively to each other, the section 7 may be adjusted lengthwise of the tool-post section by loosening the clamping-nut 17, or the section 6 may be rocked upon its pivot by means of the adjustingscrew 37. It is also evident that the tool-rest 45 may be adjusted vertically or horizontally relative to the grinding-surface by simply loosening the clamping-screws 43 or 4:7, as maybe required. In like manner the drivingshaft 1 may be adjusted toward and away from the axis of the grinding member either for tightening or loosening the belt or for forcing the friction-wheel 20 into and out of engagement with the periphery of the revoluble member of the lathe in contact therewith simply by loosening the clamping-nut 14.

When it is desired to grind cutters having peripheral cutting edges, the upper and lower bars 48 and 49 are removed and the lower bar or hearing is inserted in an opening 67, provided in the section 7. In this case I usually employ a sleeve, as 68, Fig. 5, adapted to closely fit the bore of the cutter, which is mounted thereon, said sleeve being movable by hand transversely of the grinding-surface, with the cutting edge of the tool engaged with the upper end of the rest in the usual manner.

The operation of my invention will now be readily understood upon reference to the foregoing description and the accompanying drawings, and it will be noted that some change may be made in the detail construc tion and arrangement of the parts of the device without departing from the spirit of my invention. Therefore I do not limit myself to the precise construction and arrangement shown and described.

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. A grinding attachment for lathes comprising a support, for the tool to be ground, a grinding-wheel and a rest for the edge of the tool, means to simultaneously adjust the wheel and rest toward and away from the support, and means actuated by a revolving part of the lathe to drive the grindin -wheel.

2. A grinding attachment for lathes comprising a frame adapted to be secured to a tool-post, a support for the tool to be ground,

an oscillating member adjustable on the frame and carrying a grinding-wheel and a rest for the edge of the tool, clamping means for said member and means to rotate the grinding-wheel.

3. In combination with a tool-post, an attachment comprising a tool-post section, a grinding-wheel-supporting section, an additional section having a sliding support carrying the tool to be ground, each of the latter sections being adjustable toward and away from the other, and a rest for the edge of the tool carried by the grinding-wheel section for the purpose specified.

4:. A lathe attachment comprising a toolpost section, an adjustable section pivotally mounted on the former section, means to clamp the second section in position, a grinding-wheel carried by the second section, a rest for the edge of the tool mounted on the second section and adjustable in planes at an angle with each other, and a sliding support for the tool to be ground adjustable toward and away from the grinding-wheel for the purpose described.

5. In a lathe attachment, a tool-post'section and a grinding-wheel carried thereby, in combination with a rotatable head for supporting the article to be ground, said head having an independent sliding movement toward and away from the grinding-wheel, and means to rotate the grinding-wheel.

6. In a lathe attachment, a tool-post section and a grinding-wheel carried thereby, in combination with a rotatable head for supporting the article to be ground, said head having an independent sliding movement relative to the wheel and the grinding-wheel being adjustable toward and away from the sliding plane of movement of the head, and means to rot-ate the grinding-wheel.

7. In combination with a grinding-wheel of a lathe attachment, a rotatable head and a sleeve journaled on the head and arranged to axis of the wheel, a rotatable head mounted to slide on the ways, a sleeve journaled on the head and arranged to support the article to be ground, and means to clamp the article to the sleeve.

10. An attachment for lathes comprising parallel bearings, a grinding-wheel journaled in one of the bearings, a sliding section mounted on the other bearing, a head rotatably mounted on said section, a sleeve journaled in said head to support the article to be ground, clamping means for the head, means to secure the article to the sleeve.

11. An attachment for lathes, comprising a frame adapted to be secured to the tool-post of a lathe, a driving-shaft adjustably mounted on the frame and provided with a frictionwheel to engage one of the revolving parts of the lathe, a grinding-wheel journaled in the frame and adjustable toward and away from the driving-shaft, power-transmitting means from the driving-shaft to the wheel, a rest adjustable with and independently of the grindingwheel, a guide or bearing mounted on the frame and adjustable toward and away from the grinding-wheel, a sliding support on said guide or bearing, a rotatable head on the support, a sleeve journaled in the head to receive the article to be ground, and means to clamp the article to the sleeve.

In witness whereof I have hereunto set my hand this 26th day of October, 1901.

ROSS M. RUSSELL.

Witnesses:

lVIILDRED M. NOTT, HOWARD P. DENISON. 

